# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from hidet.ir.tools import infer_type
from hidet.ir.type import TensorType, TensorPointerType
from hidet.ir.expr import Expr


def get_tensor_type(expr: Expr) -> TensorType:
    expr_type = infer_type(expr)
    if isinstance(expr_type, TensorType):
        return expr_type
    elif isinstance(expr_type, TensorPointerType):
        return expr_type.tensor_type
    else:
        raise TypeError('Can not infer the expr type to get a tensor type, got {}'.format(expr_type))
